code: def _is_real_number(x):
      """Check if x is a real number"""
      return isinstance(x, (int, float, complex)) and not isinstance(
          x, bool
      )
  
file_path: gluon-cv/gluoncv/auto/estimators/utils.py
imports: import numpy
label_desc: Use image node_id 3 for calling a global function with example usage: _is_real_number(x) and returns: unknown